Association of motor milestones, SMN2 copy and outcome in spinal muscular atrophy types 0–4. Issue 4 (20th January 2017) - Wadman, Renske I; Stam, Marloes; Gijzen, Marleen; Lemmink, Henny H; Snoeck, Irina N; Wijngaarde, Camiel A; Braun, Kees P J; Schoenmakers, Marja A G C; van den Berg, Leonard H; Dooijes, Dennis; van der Pol, W-Ludo